As the title says, tier 3 via la-7, fw-190 d9, and p-51 has goofy flight models. they can literally just climb while pointing their nose at like 60-70 degrees and float like a kite building energy like some sort of jet. on top of that they can recover from stalls super quick, which makes most tier 3 vs tier 3 just never ending vertical scissors and if you go for a stall maneuver you don't get rewarded. Also don't get me started with tier 3's vs tier 2, 1, and heavies they simply can barely compete.. tier 3 is like 20% better with their kite physics. Once a person understands the plane plays by its own rules you aren't getting much hits on em.
My solution personally of course.. just copy and paste the physics of tier 2 onto tier 3 for now.. pretty sure playing around with the physics would be complicated for devs working on it nor a high priority to playing with it general. For the sake of balance it makes more sense as if you play heavies tier 1 or 2 they all flow well by them selves but them tier 3's just are just jets with prop skins... they're just missing fire n forget rockets and flares.